Optimizes all solar panels charge rates. Prevents over/under charging. Full time desulphation pulses safely extends life and performance of all batteries. Features exclusive U.S. Patented PulseMode desulphation circuitry, designed to safely remove sulphation. Purchasing this unit qualifies for a Free Digital Multi-Volt Meter (DMVM) (valued at $24.48) when you register your warranty at www.BatteryMINDers.com.